Which Arabic dialect is hardest for other Arabs to understand?

Moroccan, Algerian and Tunisian are usually cited as the hardest for speakers from further east, because of their Tamazight and French influence and their reduced vowels.

Which Arabic dialect does everyone understand?

Egyptian comes closest, because Egyptian film, television and music have reached Arabic speakers for generations.

Guides

Can Arabic speakers from different countries understand each other?

Often, but not always. Speakers of neighbouring dialects usually understand each other well, while speakers from far apart, such as Morocco and Iraq, can struggle and will often simplify their speech or switch toward Egyptian, Modern Standard Arabic or another shared language.

What decides how well they understand each other

Distance: Levantine speakers follow each other easily. A Moroccan and an Iraqi may not.
Exposure: Egyptian and Lebanese media reach the whole region, so most Arabic speakers understand them even if they do not speak them.
Direction: Moroccans, Algerians and Tunisians often understand Eastern dialects better than Eastern speakers understand them, because media mostly flows one way.

A quick illustration

Asking the price, country by country:

Dialect	Say it	Arabic
🇲🇦 Moroccan Arabic	bsh7al	بشحال؟
🇩🇿 Algerian Arabic	bsh7al	بشحال
🇱🇾 Libyan Arabic	bikam	بكم
🇪🇬 Egyptian Arabic	bikam	بكام؟
🇱🇧 Lebanese Arabic	addeesh	قديش؟
🇸🇦 Saudi Arabic	bikam	بكم؟
🇦🇪 Emirati Arabic	bkam hatha	بكم هذا؟
🇮🇶 Iraqi Arabic	beysh	بيش

What people do when they do not understand

Speakers soften their dialect, swap unusual words for widely known ones, and borrow from Modern Standard Arabic. This happens constantly and naturally, and it is a normal part of being an Arabic speaker.

What this means for learners

Learning one dialect well will not let you understand all of them, but it will give you most of the shared core. Your second dialect will come much faster than your first.

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Common questions

Which Arabic dialect is hardest for other Arabs to understand?: Moroccan, Algerian and Tunisian are usually cited as the hardest for speakers from further east, because of their Tamazight and French influence and their reduced vowels.
Which Arabic dialect does everyone understand?: Egyptian comes closest, because Egyptian film, television and music have reached Arabic speakers for generations.